Between Sept. 28 and Oct. 1, meanwhile, the traveler visited three sites in New Square, a Hasidic village in Rockland County, the department said.

The traveler visited Bais Medrash synagogue between 9 a.m. and 2 p.m. on Sept. 28, between 11 a.m. and 3 p.m. on Sept. 29, and between 12:30 p.m. and 4 p.m. and 5 p.m. and 9 p.m. on on Sept. 30, according to the department.

The traveler also visited Refuah Health Center between 11:30 p.m. and 2 a.m. on Sept. 29 and between 12:30 p.m. and 3:30 p.m. on Oct. 1, according to the department.

Measles symptoms include “a fever, rash, cough, conjunctivitis or runny nose” and can appear as soon as a week after exposure or as late as three weeks afterward, the health department said.

Anyone who may have been exposed to the traveler’s measles should contact their health care provider, a local clinic or an emergency department before they seek treatment, to keep people at those facilities from being exposed as well.